Hello all,
I am hoping someone may be able to advise me about an intermittent fault on my 2006 C5 diesel. The symptoms are:
1. Engine occasionally cutting out while driving.
2. Engine occasionally failing to start.
The faults occur just often enough to destroy confidence in the car.
I have had the fault codes read, with the following results from the log:
53 times - code 7151 Engine speed info.
20 times - code 0337 Engine speed signal SC between two wires or OC.
Any help would be greatly appreciated.
C5 diesel intermittent engine fault.
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Re: C5 diesel intermittent engine fault.
For P0337, you probably need a new engine speed sensor as this recorded as: Engine speed signal: Signal not coherent. There is an incoherent number of teeth on the target of the engine speed sensor: No long tooth on more than 6 CAM heads (No. of heads arising from the camshaft sensor signal to confirm the synchronisation with the crankshaft sensor (TDC).
This will result in cutting of the injection if there is a resynchronisation failure. Suspect areas are: Engine speed sensor, Engine speed sensor target, Electrical harness or Connector.
Code 7151 is not recognised - so not a PSA code as there is a letter missing at the beginning.
This will result in cutting of the injection if there is a resynchronisation failure. Suspect areas are: Engine speed sensor, Engine speed sensor target, Electrical harness or Connector.
Code 7151 is not recognised - so not a PSA code as there is a letter missing at the beginning.
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Marc
Marc
Re: C5 diesel intermittent engine fault.
This is a known fault on this engine, you need to replace the crank sensor and replace the connector with a modified one that has better connections.
With the engine running you can usually make the fault happen by wiggling the plug on the sensor. Be very careful doing this as its right next to the moving crank pulley & belt.
With the engine running you can usually make the fault happen by wiggling the plug on the sensor. Be very careful doing this as its right next to the moving crank pulley & belt.
- GiveMeABreak
- Forum Admin Team
- Posts: 37420
- Joined: 15 Sep 2015, 19:38
- Location: West Wales
- My Cars: C3 Aircross SUV HDi Flair Peperoncino Red (The Chili Hornet)
C5 X7 2.0 HDi Exclusive Mativoire Beige (The Golden Hornet)
C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow - x 5741
Re: C5 diesel intermittent engine fault.
This is a different name for the same sensor to avoid confusion.
Please Don't PM Me For Technical Help
Marc
Marc
Re: C5 diesel intermittent engine fault.
My mistake, I just wrote down the numbers. I think it was P7151. Thanks.GiveMeABreak wrote: ↑05 Aug 2021, 11:55 Code 7151 is not recognised - so not a PSA code as there is a letter missing at the beginning.
- GiveMeABreak
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- Joined: 15 Sep 2015, 19:38
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C3 1.6 HDi Exclusive Aluminium Grey (The Silver Hornet)
C5 MK II 2.0 HDi Exclusive Obsidian Black
C5 MK I 2.0 HDi SX Wicked Red
Xantia S2 2.0 HDi SX Hermes Red
C15 Romahome White
XM 2.0 Turbo Prestige Emerald Green Pearlescent
XM 2.0 Turbo Prestige Polar White
XM 2.0 SX Polar White
CX 20 Polar White
GS 1220 Geranium Red
CX 2.4 Prestige C-Matic Nevada Beige
GS 1000 Cedreat Yellow - x 5741
Re: C5 diesel intermittent engine fault.
No, codes listed for P7151, P1571, P1751 for this engine, but I'd focus on the sensor now and or check the connector as Wheeler mentions.
Please Don't PM Me For Technical Help
Marc
Marc
Re: C5 diesel intermittent engine fault.
I’ll try & dig out a part number for you tomorrow. You cut the old plug off (noting the wire positions first) and if I remember right the new plug is pre wired with a few inches of wiring. Again if I remember right the terminals are gold plated the same as Renault done with their crank sensor connections.
Re: C5 diesel intermittent engine fault.
Also do you have the VIN or Reg of the car available? I need some further details of the car.
Re: C5 diesel intermittent engine fault.
OK the fault in question apparently on affects vehicles with an RP number range between 10736-10816.
Yours is well before this so may just be a failing sensor. on the affected sensors the pins are known to oxidise & cause a poor connection.
Try & see if you can replicate the fault like i said by carefully wiggling the sensor connector.
In the meantime i'm still trying to find the part no of the modified plug incase it is needed.
Yours is well before this so may just be a failing sensor. on the affected sensors the pins are known to oxidise & cause a poor connection.
Try & see if you can replicate the fault like i said by carefully wiggling the sensor connector.
In the meantime i'm still trying to find the part no of the modified plug incase it is needed.
Re: C5 diesel intermittent engine fault.
Unfortunately, with my engine, the sensor is behind the wheel arch, and you have to remove the wheel to get to it, so it's a bit hard to test. Thanks.wheeler wrote: ↑06 Aug 2021, 11:07 OK the fault in question apparently on affects vehicles with an RP number range between 10736-10816.
Yours is well before this so may just be a failing sensor. on the affected sensors the pins are known to oxidise & cause a poor connection.
Try & see if you can replicate the fault like i said by carefully wiggling the sensor connector.
In the meantime i'm still trying to find the part no of the modified plug in case it is needed.